23833A245
2
DESCRIPTION AND APPLICATION
ME40
Myers ME40 Series Pumps are single seal units,
automatic or manual, designed for use in effluent
dosing. Septic Tank Effluent Pumping (S.T.E.P.) or
normal sump and general dewatering applications
where higher pressure is required. DO NOT USE FOR
RAW SEWAGE.
When used in effluent dosing or S.T.E.P. applications,
the pump must be installed in a separate tank or
compartment at the discharge side of the septic tank.
NEVER INSTALL PUMP IN MAIN TANK WHERE
SLUDGE COLLECTS.
Impellers are enclosed two-vane type to handle
3/4” spherical solids and are made of engineered
thermoplastic. All pumps have a 1-1/2” NPT
discharge tapping. NOTE: DO NOT OVERTIGHTEN
DISCHARGE PIPE INTO PUMP PLASTIC
DISCHARGE FITTING.
General
These pumps are available in 115 volt or 230 volt,
single phase, 4/10 HP motors. All units are single seal
only, available in automatic or manual with either 10’ or
20’ power cords. All power cords have either 115 volt
or 230 volt grounded plugs.
These pumps are NOT for use in swimming pools or
fountains.
ME40AG
The ME40AG Series Pumps are single seal units
designed for use in continuous run agricultural
evaporative cooling applications. They will run
continuously in elevated temperatures with clean
sump water.
The wetted pump components are the same as
already described for the ME40 series.
AIR LOCKING
A sump pump is said to be air locked if water traps air
in the pump and it cannot get out, thus preventing the
pump from operating.
The ME40/ME40AG pumps have a 1/16” air vent hole
in the impeller chamber to let out trapped air. If this
hole becomes plugged, the pump may air lock. As
a secondary precaution a 1/8” hole should be drilled
in the discharge pipe below the check valve. The
check valve should be 12 to 18 inches above pump
discharge. Do not put check valve directly into pump
discharge opening.
PACKAGING
Each pump is packaged separately in a carton marked
with a catalog number and Myers engineering number.
Catalog
Engineering
Cord
No.
No.
HP
V Ph Lgth.
Type
ME40A-11
25300D000
4/10 115 1
10’
Auto
ME40M-11
25300D001
4/10 115 1
10’
Manual
ME40AC-11
25300D010
4/10 115 1
20’
Auto
ME40MC-11
25300D011
4/10 115 1
20’
Manual
ME40AC-21
25300D012
4/10 230 1
20’
Auto
ME40MC-21
25300D013
4/10 230 1
20’
Manual
ME40P-1
25300D900
4/10 115 1
10’
Auto
ME40PC-1
25300D901
4/10 115 1
20’
Auto
ME40P-2
25300D902
4/10 230 1
10’
Auto
ME40PC-2
25300D903
4/10 230 1
20’
Auto
ME40AG-11
27234D001
4/10 115 1
20’
Manual
ME40AG-21
27234D002
4/10 230 1
20’
Manual
LEVEL CONTROLS
All pumps must use sealed level control switches for
automatic operation. All automatic pumps have built-
in level control float switches. The power cord has a
GROUND PIN that plugs into a grounded receptacle.
The grounded receptacle cannot be used in the wet
sump or basin due to DANGER of current leakage.
Manual pumps can be made automatic with MLC or
MFLC controls with a series plug. Plug the MLC or
MFLC witch cord series plug into a proper voltage
GROUNDED RECEPTACLE. Then plug the pump
cord plug into the back of the switch cord series plug.
NOTE: The float control must be tethered a minimum
4” to pump or discharge pipe. Control must float free
from pump and basin wall.
On all duplex units or simplex installations with
additional options like high water alarm, the power
cord plug must be cut off and wired into a control
panel or into a sealed junction box if used in wet sump
or basin. The AWS-1 control also acts as a sealed
junction box for connecting power cord to pump cord.
NOTE: The ME40 sump/effluent pump can be easily
changed from one style, automatic or manual, to the
other by only interchanging the plug ends of the float
control with the manual plug. The ball float must be
tethered with a cable clamp, as
shown. DO NOT REMOVE THE
MOTOR CAP.
The ME40P pumps have a
mechanical (mercury free) float
switch with a 10’ or 20’ cord with a
115 volt or 230 volt piggyback
plug with the switch mounted to
the pump. Plug the switch cord
plug into a proper voltage, properly
grounded outlet and plug the
power cord into the back of the
switch cord and tape the cords to
the discharge pipe every 12”.